Intake question 302 EFI performance
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More Turbo
Joined: Mar 2003
Posts: 665
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From: Detroit suburb
Intake question 302 EFI performance
The other discussion getting pretty full so try again. Many comments showing the truck 302 was better than the 351 stock components and better than the mustangs, generally. I have a 92 currently with speed density 5.0. Question is has there been testing to show that the newer 95 to 97 versions flowing better ? Is it worth trying to upgrade to the newer stock version ? What is needed to do that ? Computer swap ? Plumbing for intake, wiring issues ?
Logistics Pro
Joined: Aug 2010
Posts: 3,718
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From: Chillicothe
From what I've read and understood, your biggest restrictions will be the factory exhaust followed by the factory cam. The intake should be the last thing on the airflow problem list. Bit perhaps I interpreted the info wrong.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
No they don't, the reason the '94+ motors make more power is because it has a bigger cam so that is what you need.
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More Turbo
Joined: Mar 2003
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From: Detroit suburb
Ok, thanks guys. Just want to make sure I am going in right direction. Found some long tubes for the 5.0 last weekend at the local pull a part, so thinking of doing the cam and exhaust (maybe) consider the gt 40p heads on this one, then take the slow methodical approach with the 5.8. Discovered by using a laser thermometer that my 2 cats on this truck are not working, so perhaps there is some restriction there ? Here's the question on exhaust, since I may use the setup on the 5.8 later, does 2.5 single sound decent, with the long tubes ?
Elder User
Joined: Nov 2009
Posts: 666
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From: Chicago area
Cam swaps are OK with SD as long as the lobe centers are at least 112-114 deg. To get that you really can't get a cam with long overlap or very high lift (Over .500 inch) since the physical limitations of a cam prevent that. Both of the latter are bad for stock SD.
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